Submitted Name Save Type River Usage English Pronounced Pron. TEMZ [key] Edit Status Status [show contributorhide contributor] Added 6/9/2017 by McLeeds Meaning & History The name of the river in southern England on which London is situated. This is a Brythonic river-name, explained as a derivative of Common Brythonic *temēlos, 'darkness' (compare Old Welsh timuil, 'darkness').